Die



W. G. TROHON.

DIE

APPLICATION FILED JUNE 26, 918.

Patented J an. 20, 1920.

UNITED STATES PATENT OFFICE.

WILLIAM G. TROI-ION, OF DANVERS, MASSACHUSETTS, ASSIGNOR TO UNITED SHOEMACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEWJERSEY.

DIE.

Specification of Letters Patent.

Patented Jan. 20, 1920.

Application filed June 26, 1918. Serial No. 242,011.

To all whom it may concern:

Be it known that 1, WILLIAM G.- TRoHoN, a citizen of the United States,residing at Danvers, in the county of Essex and State of Massachusetts,have invented certain Improvements in Dies, of which the followingdescription, in connection with the accompanying drawings, is aspecification, like reference characters on the drawings indicating likeparts in the several figures.

This invention relates to dies, and especially to those, such as cuttingdies, which are grasped by the operator to move them over the work. Itis therefore desirable to furnish a guard to prevent the operators handsfrom slipping and being caught between the pressure-receiving surface ofthe die and the pressure-applying device.

An object of the present invention is to provide dies of this characterwith an inexpensive guard efiicient in retaining the implement againstslipping in the operators grasp, and which, without adding materially tothe weight, shall be strong enough to resist rough usage.

As a feature of the invention, a guard attached to the die and in theform of a resilient member is employed, it preferably eonsisting of ahelical spring, which not only readily conforms to the contour of thedie to which it is applied, but which is also light and highly resistiveof pressure which might deform it. Moreover, such a guard cooperateswith the die wall to furnish a depression tending to seat itself firmlyupon the upturned edges of the hands and, by the transverse depressionsbetween its convolutions, to further resist displacement.

Another feature of the invention concerns the means for securing theguard in place. It is shown as fixed to the die at a plurality ofpoints, their number and location depending upon the size and shape ofthe die. lVith a non-continuous guard the ends are fastened to the diewall, preferably by a member, as a wire, passing through it, and mayalso have means intermediate the ends for retaining it in place. I haveshown this intermediate means as consisting of a cradle of solder, whichboth furnishes a lateral supporting wall for the guard and alsopositively adheres to it, being particularly effective in enteringbetween the turns of the helical guard. lVith this solder, an additionalretaining means or clip may be used to strengthen the joint andfacilitate the attaching operation, especially at reentrant portions ofthe die. This last-mentioned securing means, with or without the clip,may also be used in connection with a continuous guard.

When the guard is continuous, I prefer, as a feature of the invention,to connect its adjacent ends; and, as it is flexible, the connector mayalso "be flexible to render easier its application to the guard and theguard to the die. A very secure connecting device is furnished by ahelix screwed within the ends of the guard helix.

If desired, the guard may, as a further feature of the invention, beconstructed of a plurality of members, one within another. To givemaximum strength, plural tubular members, as helices, are employed,these being concentric, and through these tubular members an inner solidmember may pass,

.this in the discontinuous guard being utilized to attach it to the dieWall.

Other features of the invention will be developed by the followingdetailed description of certain embodiments of my invention which areillustrated in the accompanying drawing, in which 'Figure 1 representsin perspective a sole die having separated guards applied to the heeland toe portions;

Fig. 2 shows similarly the securing means for one of the guards;

Fig. 3 illustrates in perspective another form of die with a continuousguard;

Fig. 4 is a perspective view of a clip which aids in securing the guard;

Fig. 5 is an enlarged longitudinal sectional detail of theguard-connecting means with the elements separated; and

Fig. 6 is an enlarged detail in broken perspective of this connectingmeans in place Referring to Fig. 1, a sole die D of the usual form isshown, having a lower cut ting edge 0 and an upper pressure-receivingedge 9. As such dies are usually handled during cutting operations bythe extremities only, separated guards 10 or 12 are, in

the present instance, attached to these portions, they extendingadjacent and parallel to the edge 79. The guard 10 appears as a helicalspring 14, preferably of steel wire of a suflicient strength to resistthe crushing forces to which 'it may be subjected in use. The diameterof the spring is such that a recess 16 is furnished between the wall ofthe die and the curved lower side of the guard, these surfacesconverging upwardly so that the recess is generally of inverted V-shapeand of sufficient width to receive the upper edges of the operatorshands, so that they are effectively prevented from slipping over theportion 79 of the die. The shifting of the die in the operators grasp isfurther guarded against by the transverse depressions between the turnsof wire, which, by their engagement with the flesh, furnish a sufficientresistance to its twisting or rotary movement. It should further beobserved, that with a guard of this resilient character there is atendency to conform to the outline of the hands, making engagement morecertain. The ends of the guard spring are shown as tapered at 18 tobring it closely to the wall of the die and remove shoulders which mightcatch in objects. .Though a helix of resilient material offers highresistance to permanent distortion, in some dies, particularly if largeand heavy, or some parts of dies more liable to be subjected to blows orconsiderable pressure, it may be desirable to provide a guard strongerthan the single helix 1%. For this purpose, the guard 12 is bettersuited, there being an outer helix 20 similar to 14, and an inner helix22 introduced before both ends 18 of the former are tapered, it fittingclosely within and being concentric to the outer helix. To secure eitherof the guards 10 and 12 in place, an inner solid member, which mayconsist of a wire 24:, is passed through the center and formed in itsextremities outside the ends 18 into eyes 26 which engage projectionsfurnished by pins 28 headed at their outer ends and riveted through thedie wall.

To hold the guard in place between the pins 28, a retaining means 30 maybe provided. This is here shown as consisting of a cradle having a baselying against the wall of the die and side walls 32 which extend aboveand below the guard. These cradles are preferably built up of solder andadhere both to the die wall and to the outer helix, and, when the innerhelix is employed, to this as well, thus anchoring the entire guardstructure firmly in place to prevent shifting both laterally andlongitudinally.

In Fig. 3 a die d of such form is illustrated that its guard 34encircles the entire wall. Like the guard 12, this guard 34 has outerand inner helices 36 and 38. To join the adjacent ends of the helix 36,there cooperates with them a connector 4E0, which may consist of a helixsection similar to that forming the guard, but of such diameter that itmay be screwed within one of the guard ends, and then the opposite endscrewed over it, this corresponding in effect to a threaded nipple. Withits ends thus united, the guard may be sprung over the die by virtue ofits resiliency, and, because of its flexibility, will conform perfectlythereto.

To fix the guard 34in place, the cradles 30 of solder may be utilized,so disposed as to hold it to the die wall wherever it is necessary.WVhere there are re'ejntrant portions, as at 1", I find it desirable touse an additional securing element, consisting of a clip 42. This clipmay be of relatively thin sheet metal having a shank 34; adapted to liein contact with the wall of the die, and a curved portion 46 generallyconforming to the member 36. In constructing the connecting means withthis clip, the latter is placed over the guard with the shank in contactwith the die wall and pressed against it in any convenient way. Solder,is then flowed in beneath the clip, between it and the die, and aboutthe guard. There results an arrangement similar in eiiect to that of theretaining means shown at 30 in Fig. 1, except that it holds the guardmore firmly to the die. While, as pointed out, this arrangement is ofparticular utility for fastening the guard to depressions of a die wall,it may to advantage be employed wherever it may be desired to strengthenthe cradles 30. In using'a continuous guard with connected ends, it isdesirable to locate one of the securing means 30 over the connector 40,as is illustrated in Fig. 6. By so arranging the structure, the solderenters both the main and connecting helices and binds them securely toeach other and to the die.

The connector is not necessarily confined in its use to the continuousguard of Fig. 3, but may also be used to join sections of anon-continuous guard. For example, Fig. 6 may be considered to be anenlarged detail of a cradle associated with the guard 12 in Fig. 1, aswell as with the guard 36 in Fig. 3.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. A die provided with a guard including a resilient member attached tothe die.

2. A die provided with a guard including a tubular member attached tothe die.

3. A die provided with a guard including a helix carried by the die.

4:. A die provided with a guard including a helical spring arranged forcontact with the hands of the operator grasping the die.

5. A die provided With a guard including a member curved in crosssection and having a series of transverse depressions.

6. A die provided with a guard capable of conforming to its contour andyielding upon contact with the hands of the operator, and means forsecuring the guard to the die at a plurality of points.

7. The combination with a die having a cutting edge and apressure-receiving edge, of a helix extending about the die adjacent tothe pressure-receiving edge, and means for securing the helix to thedie.

8. The combination with a die, of a spring guard extending about it, andmeans for securing the guard to the die at separated points.

9. The combination with a die, of a spring guard extending about it andhaving separated ends, means for securing these ends to the die, andmeans for supporting the spring laterally at intermediate points.

10. The combination with a die having aprojection, of a guard secured tothe projection and being movable relatively to the die at pointsintermediate the projections.

11. The combination with a die, of a tubular guard member extendingabout the die, a member passing through the tubular memher, and meansfor securing this inner member to the die.

12. The combination with a die provided with a projection, of a tubularguard member extendin about the die, and member passing through thetubular member and being secured to the projection.

13. The combination with a die, of a guard member extending about andhaving a wall converging toward the wall of said die, and retainingmeans for a portion of the guard member filling the space between themember and die wall.

1%. The combination with a die, of a guard member extending about andhaving a wall converging toward the wall of said die, this guard memberbeing provided with depressions, and retaining means for a portion ofthe guard member filling the space between the member and die wall andentering the depressions.

15. The combination with a die, of a helical spring guard, and a cradlesecured to the die for retaining the guard in place thereon.

16. The combination with a die, of a helical spring guard, and a cradleof solder for retaining the guard in place on the die.

17. The combination with a die, of a guard therefor, and a membersurrounding the guard and being secured to the die.

18. The combination with a die, of a guard therefor, a clip cooperatingwith the outer side of the guard, and means for securing the clip to thedie.

19. The combination with a die, of a guard therefor, a clip consistingof a portion surrounding the outer portion of the guard and a portionextending along the wall of the die, and means for securing the clip tothe die.

20. The combination with a die, of a guard therefor, a clip consistingof a portion surrounding the outer portion of the guard and a portionextending along the wall of the die, and means for securing the clip tothe die and guard.

21. A die provided with a guard comprising a plurality of concentricmembers extending about the die.

22. A die provided with a guard comprising members one within another.

23. A die provided with a guard comprising members one within another,and means for securing both members to the die.

24. A die provided with a guard comprising inner and outer tubularmembers.

25. A die provided with a guard comprising inner and outer concentricmembers extending in contact with one another about the die.

26. A die provided with a guard comprising a tubular member and a solidmember extending therethrough about the die.

27. A die provided with a guard comprising a tubular member and a solidmember extending therethrough and being secured at both extremities tothe die, and means for securing the solid member to the die.

28. A die provided with a guard comprising inner and outer tubularmembers, and a solid member extending through the tubular members.

29. A die provided with a guard comprising concentric helical springs.

30. A die provided with a guard comprising concentric helical springs,and solder connecting the springs to the die.

31. A die provided with a guard comprising concentric helical springs,and a wire extending through the inner sprin 82. A die provided with aguardcomprising concentric helical springs, a wire extending through theinner spring, and means for securing the wire to the die.

33. A die provided with a guard including a flexible member havingadjacent ends, and a connector between the ends.

34. A die provided with a guard including a flexible member havingadjacent ends, and a flexible connector between the ends.

35. A die provided with a tubular guard having adjacent ends, and meanssituated within the guard for connecting said ends.

36. A die provided with a helical guard having adjacent ends, and ahelix connecting the ends.

37. A die provided with a helical guard having adjacent ends, and ahelix screwed within the adjacent ends.

'38. The combination With a'die, of a member extending about the dieandhaving adjacent ends, a connector for said ends, and means forsecuring the ends and connector 5 to the die.

39. The combination With a die of a helical member extending about thedie and having adjacent ends, a helix connecting said ends, and soldersecuring the ends of the member and the helix to the die. 10

In testimony whereof I have signed my name to this specification.

WILLIAM G. TROHON.

Correctionsin Letters Patent No. 1,328,347. I

It is hereby certified that in Letters Patent N 0. 1,828,347, grantedJanuary 20, 1920, upon the application of William G. Trohon, of Danvers,Massachusetts, for an improvement in Dies, errors appear in the printedspecification requiring correction as follows: Page 2, line 123, claim2, for the Words attached to read carried by; same page, line 125, claim3, for the words carried by the die read extending along the peripheryof the die; and that the said Letters Patent should be read with thesecorrections therein that the same may conform to the record of the casein the Patent Ofiice.

Signed and sealed this 4th day of May, A. 1)., 1920.

M. H. COULSTON,

Acting Commissioner of Patents.

[SEAL]

